On his way to his own birthday party, T-Rex steps into a gooey tar pit and soon is trapped. Fortunately, his dinosaur friends—Stegosaurus, Pterodactyl, Ankylosaurus, Triceratops, and Ultrasaurus—pitch in to help him out. Will they find a way to work together and help T-Rex have a happy day? With two question-and-answer flaps and a jigsaw puzzle illustration on every two-page spread, this book is part of a series encouraging beginning readers to observe details and glean information from their reading. The six 15-piece puzzles feature interlocking borders, allowing youngsters to connect the illustrations together as they please.